Track Titling Macro

Try this. Included lower case. (It's not un-doable though, but it's faster this way). title is "Title Case"

/**
 * Change the case of all selected Pro Tools track names.
 *
 * @param {"upper"|"lower"|"title"} caseStyle - Desired case style
 */
function trackNamesCaseChange(caseStyle = "upper") {
    sf.app.proTools.tracks.invalidate();

    sf.app.proTools.tracks.allItems
        .filter(t => t.isSelected)
        .forEach(t => {
            let newName;

            switch (caseStyle) {
                case "lower":
                    newName = t.name.toLowerCase();
                    break;
                case "title":
                    newName = t.name
                        .toLowerCase()
                        .replace(/\b\w/g, char => char.toUpperCase());
                    break;
                case "upper":
                default:
                    newName = t.name.toUpperCase();
            }

            if (t.name !== newName) sf.app.proTools.renameTrack({ oldName: t.name, newName });
        });
}

trackNamesCaseChange("title"); // "upper", "lower", or "title"